About Sean
Sean Timmons built a law career that moves between military service, courtroom work and firm leadership. He earned a B.A. from the University of Texas at San Antonio in 2005, a J.D. from South Texas College of Law in 2008, and an LL.M. from the University of Houston in 2015. Those degrees underpin a varied professional path that began well before law school.
His first ties to uniformed service date to 1997, when he entered the United States Army as a soldier. After undergraduate studies he worked outside the law for a time, serving as a human resources manager at Sears Holding Corporation in 2005. He took on law clerk roles while in school, working in 2007 for Hennessy, Gardner & Barth and in 2008 for Brown Sims. After earning his J.D., he returned to the Army as a Judge Advocate in 2009, applying both legal training and military experience to client and command needs.
In the years after active military legal service he moved into civilian practice. He joined Mostyn Law Office as an associate in 2013. He completed his LL.M. in 2015, then moved into firm leadership in 2016 when he became managing partner at Tully Rinckey PLLC. That role placed him in a position to oversee case strategy, client intake and firm operations while continuing to practice.
Timmons is licensed in both New York and Texas. He holds memberships in a range of professional organizations, including the New York State Bar Association and the Albany County Bar Association since 2016. He has been active in the State Bar of Texas across several sections since the early 2010s and has served as vice president of the Military Law Section. His professional affiliations extend to national groups such as the American Bar Association and the Federal Bar Association. Timmons also belongs to veterans organizations, including the Veterans of Foreign Wars and Disabled American Veterans, reflecting a continuing connection to military communities. He was a member of the Texas Trial Lawyers Association from 2015 to 2017.
His work history includes government, private firm and corporate roles. That range informs how he approaches cases and client counseling. He practices at Tully Rinckey PLLC and handles matters that draw on his military background and his experience in labor, employment and insurance issues. His practice includes military, labor and employment, and insurance matters.
